These online heredity calculators use simplified models to calculate traits and their certainty is far from 100% due to the fact that
human genetics is far more complex than a simple mendelian dominant/recessive model. Personal Report
and Heredity Report give better results, providing that you had your genome
sequenced by a commercial personal genomics companies like 23andMe, deCODEMe, Ancestry.com or Family Tree DNA.
In any case, these reports do not substitute for
clinical tests, genetic counseling or paternity/maternity tests. If you have questions about your genetic heritage,
its relation to diseases or any other health-related issues you should consult your doctor.
Genetic Heredity Calculator.
Alcohol flush reaction is a condition in which an individual's face or body experiences flushes or blotches as a result of an accumulation of acetaldehyde, a metabolic byproduct of the metabolism of alcohol.
This calculation uses a single gene complete dominance model.More information on Alcohol Flush Reaction:
The ABO system is the most important blood-group system in human blood transfusion. ABO types are classified by presense and absense of associated anti-A and anti-B antibodies. Presense of these antibodies is encoded by one genetic locus, the ABO locus, which has three alternative forms:A, B, and O. A child receives one of the three variants from each parent, giving rise to six possible genotypes and four possible blood types.
This calculation uses a four-gene (three for blood type, one for Rhesus factor) co-dominance model.More information on Blood Type (ABO):
Lactose intolerance is the inability to digest lactose, a sugar found in milk and in some milk-derived dairy products. Lactose intolerance is quite common in adults and is not dangerous, but has unpleasant symptomes such as abdominal bloating and cramps, flatulence, diarrhea, nausea, or vomiting after consuming significant amounts of dairy products.
This calculation uses a single gene complete dominance model, with lactose intolerance trait being recessive.More information on Lactose Intolerance:
Some people are naturally resistant to infection with HIV (the virus that causes AIDS) due to Delta32 mutation in the CCR5 gene that prevents the CCR5 protein from reaching the surface of the immune cells. The CCR5 protein is one of the proteins HIV uses to bind to and enter immune cells, so people who have two copies of CCR5Delta32 are almost completely resistant to HIV infection. The protection given by CCR5Delta32 mutation is incomplete though, because some strains of HIV can use another protein called CXCR4 to bind to immune cells.
This calculation uses a single gene (CCR5) complete dominance model, with the resistance trait being recessive.
Resistance to Norovirus
Noroviruses, also called Norwalk-like viruses (NLV), are one of the main causes of non-bacterial epidemics of gastroenteritis or 'stomach flu'. These viruses usually appears in closed communities like schools, ships, military camps and such. Some people are resistant to the most common strains of Norovirus thanks to a mutation in FUT2 gene.
This calculation uses a single gene (FUT2) complete dominance model, with the resistance trait being recessive.More information on Resistance to Norovirus: